Validate and identify credit cards
The Credit Card Validator helps you verify the validity of credit card numbers using the Luhn algorithm (Mod 10), which is the standard checksum formula used to validate a variety of identification numbers. It also automatically identifies the card issuer (Visa, Mastercard, Amex, Discover, etc.) based on the IIN ranges. This tool is useful for developers testing payment forms or checking for typos. Note: This tool *only* validates the number format and checksum; it does not check if the card is active, has funds, or is legitimate. All processing is done client-side, so no card data is stored or sent to any server, ensuring your privacy.